So here's the deal: you post your most useful Windows tip in the comments. We'll pick a handful of the best ones, and tomorrow readers will vote which is most deserving of the prize. Dazzle us with your Windows expertise, make us swoon in awe at your mighty knowledge of 'softie dialogs and wizards. Your tip should be something clever and handy, like getting rid of the Windows Update nag, renaming a batch of files in Explorer or getting rid of Thumbs.db, but it won't be considered if it was published here on Lifehacker already.